Sığır ayaklarının postmortem makroskopik ve histopatolojik olarak değerlendirilmesi

Özel bir mezbahadan elde edilen 112 sığıra ait 448 ayağın tırnakları, makroskopik ve histopatolojik olarak incelendi.Değerlendirilen ayakların 110'u Holstayn, 1'i Simental, 1'i yerli kara ırkına ait idi. Bunlardan 89'u erkek, 23'ü dişiydi. Ayakların makroskopik incelemesi sonucunda 38 olguda taban-ökçe çürüğü, 22 olguda taban çürüğü, 29 olguda ökçe çürüğü, 30 olguda kronik-subklinik laminitis, 12 olguda beyaz çizgi ayrılması, 4 olguda interdigital panarisyum, 6 olguda digital dermatitis, 18 olguda aşırı tırnak uzaması saptanırken ,7 sığır ayağında lezyon belirlenemedi.Kronik-subklinik laminitis, ökçe ve taban çürüğü bulunan tırnakların kapsıılalan çıkarıldı. Makroskopik olarak, kapsulada lezyon belirlenen bölgede hiperemi mevcuttu. Taban ve ökçe çürüğü bulunan olguların histopatolojik incelemelerinde, korium dokusunun normal yapısını kaybettiği ve bu dokunun tüm katlarını kaplayan mononüklear yangı infiltrasyonu olduğu belirlendi. Keratinize taban dokusuna yakın bölgedeki korium dokusunda nekroz, çevresinde ödem ve bağdoku hiperplazisi gözlendi.

Macroscopical and histopathological evaluation of postmortem cow feet

Macroscopical and histopathological investigations with respect to foot diseases were per-formed in 448 feet belonging to 112 cattle obtained from a private slaughterhouse. Of the feet which were selected for assessment 110 belonged to the Holstein breed, 1 to the Simental breed and 1 to the yerli kara breed (a local breed). Of these, 89 were male and 23 were female. Macroscopical evaluation of the feet revealed the following diseases: sole and heel erosion in 38 cases, sole erosion in 22 cases, heel erosion in 29 cases, chronic and subclinic laminitis in 30 cases. Digital dermatitis was found in 6 feet, interdigital panaritium in 4, white line separation in 12, claw overgrowth iit 18, and 8 cases had healthy claws.The capsulae of claws with chronic laminitis and heel and sole erosions were removed. A higher degree of hyperaemia was observed in corium regions relating to areas with severe sole and heel erosions in the capsule.In the histopathological evaluation of cases with sole and heel erosions and chronic laminitis, it was seen that the corium lost its normal structure and there was mononuclear inflammatory infiltration through all the layers of this tissue. Necrosis in the corium, as well as oedema and connective tissue hyperplasia, was observed in the region near the keratinised sole tissue.

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1. Bargai,U.(2000): Lameness in a Dairy Herd: An Epidemiologic Model, CompendiumVol. 22(3) 286-289.
2. Budras KD, Mulling C, Horowitz A. (1996): Rate of keratinization of the wall segment of the hoof and its relation to width and structure of the zona alba (white line) with respect to claw disease in catle. Am.J.vet.res.57(4) 444-455.
3. Kempson, S.A., Logue, D.N. (1993): Ultrastructural observations of hoof horn from dairy cows:the structure of the white line. Veterinary record, 132. 499-502.
4. Nocek J.(1997):Bovine acidosis: Implications on laminitis. J.Dairy Science. 80(5): 1005-1028.
5- Ossent P. , Lischer C. (1997): Postmortem examination of the hooves of cattle, horses, pigs and small ruminants under practise conditions. In Practice vol.19. 1. 21-28.
6. Ossent P. , Lischer C. (1998):Bovine laminitis: the lesions and their pathogenesis. In practice Vol. 20 No:8 415-427.
7. Rajala – Schultz PJ, Grohn YT , Mc Culloch CE (1999):Effects of milk fever, ketosis and lameness on milk yield in dairy cows. J. Dairy Sci. 82(2): 288-294.
8.Singh, S.S. , Ward, WR. , Murray, R.D. (1993): Technique of hoof biopsy in cattle. Veterinary Record. 133. 190-191.
9.Tronter, W.P , Morris R.S. , Willionson. N.B. (1991): A longitudinal study of the hooves of non-lame cows. New Zealand Journal 39. 53-57.
10.Yeruham I. , Aidar, Y. , Bargai U. , Adin, G. , Frank D. , Perl, S. , Bogin E. (1999):Laminitis and dermatitis in heifers associated with excessive carbonhydrate intake: skin lesions and biochemical findings. J.S.Afr. Vet. Assoc. 70(4): 167-171.
11.Weaver ,D.(1993): Advances in Bovine Digital Diseases .Bovine Practitioner ,27.23-27.